Tailoring a Bacteriochlorin Building Block with Cationic, Amphipathic, or Lipophilic Substituents
作者:Christian Ruzié、Michael Krayer、Thiagarajan Balasubramanian、Jonathan S. Lindsey
DOI:10.1021/jo800736c
日期:2008.8.1
malleable molecules. To overcome these limitations, a synthetic free base 3,13-dibromobacteriochlorin (BC-Br3Br13) has been exploited as a building block in the synthesis of diverse bacteriochlorins via Pd-mediated coupling reactions (Sonogashira, Suzuki, and reductive carbonylation). Each bacteriochlorin is stable to adventitious dehydrogenation by virtue of the presence of a geminal dimethyl group in
由于细菌氯在近红外(NIR)区域具有强吸收性,因此它们是多种医学适应症的光动力疗法(PDT)的有吸引力的候选者,但由于缺乏可稳定合成的可延展分子,因此其使用受到了阻碍。为了克服这些限制,合成了一种游离碱3,13-dibromobacteriochlorin(BC-Br 3 Br 13)已被用作通过Pd介导的偶联反应(Sonogashira,Suzuki和还原性羰基化)合成各种细菌绿素的基础。由于每个吡咯啉环中都存在双甲基二甲基基团,因此每种细菌二氯对意外脱氢均稳定。目标细菌绿素在3-和13-(β-吡咯基)位置带有阳离子,亲脂或两亲取代基。二羧基细菌二氯经由中间体二酰氯转化为酰胺衍生物。对二甲酰细菌二氯进行还原胺化,得到氨基甲基衍生物。通过Suzuki偶联引入一组带有亲脂性或两亲性基团的3,5-二取代的芳基。总共制备了22种游离碱细菌绿素。在每个分子的两个或四个胺位点上,将八个氨基烷基细菌二